>>I saw my old slide rule in my parents’ basement a few years ago, and couldn’t remember how to use it.<<
I’ve got two of them in the bookcase behind me and amazingly I can still use them .......... if I’m wearing my glasses. LOL
I was just getting used to it when the TI-30 came out (we all thought it was a miracle), and the slide rule got stuffed into a box and the brain cells for using it got reformatted.
Ha! You need a crutch too!